Machine for cutting box-corners.



PATENTED SEPT. 8,11903. l

G. E. PRIEST. MACHINE FORl CUTTING B0X GORNERS.

APPLIOATION FILED HAY 23, 1902.

No. 738,483. y y PATBNTBD SEPT. s, 190s.4

G. E. PRIEST. y MACHINE PoR CUTTING BOX GORNBRS.

rrLrouIoN Hum un 2s, 1902.

.No MODEL. s SHEETS-snm 51 l m w G 52 3 45 42 honig Co y||\|..

PATENTED SEPT. 8, 1903.

G. I1. PRIEST. MACHINE PoR CUTTING B0X GOIINERS.

APPLICATION FILED MAY 23, 1902.

3 SHEETS-SHEET 3.

N MODEL:

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. .I M v UVW UNITED STATES Patented September 8, 1903.

PATENT OFFICE.

MACHINE".` FOR CUTTING BOX-CORNERS.

SPECIFICATION forming part of Letters Patent No. 738,483, dated September 8, 1903i.

Application filed May 23, 1902. Serial No. 108,645. (No model.)

To all whom it 11i/ty concern! Be it known that I, GEORGE E. PRIEST, a citizen of the United States, residing at Orange, in the county of Franklin and State of Massachusetts, have invented a new and useful Improvement in Machines for Cutting B0X-Oorners, of which the following is a specification, accompanied by drawings forming a part of the'same, in which- Figure 1 represents a perspective View of a machine for cutting the corners of boxes and embodying my invention, said figure showing the front and one side of the machine. Fig.` 2 is a perspective view showing the opposite side and the rear of the machine. Fig. 3 is a side elevation with the side frame next the beholder removed. Fig. 4 represents a corner of a wooden box with the sides united by means of interlocking teeth, and Fig. 5 represents one of the box-sides having teeth formed on its opposite ends. Fig. 6 is a view in side elevation of a cam-wheel, and Fig. 7 is a detail view in vertical cross-section of the table and connected parts.

Similar reference letters and figures refer to similar parts in the different views.

My invention relates to that class of machines which are designed to form the kerfs for the toothed edges O upon the sides A of a wooden box, which are interlocked in the construction of the boX to form the box-corner B, as illustrated in Figs. 4 and 5, said machines comprising a gang of saws, which are spaced to form the teeth on the boxsides, and means for traversing one or more box-sides past the saws; and my invention consists in the construction and arrangement of parts, as hereinafter described, and pointed out in the annexed claims, whereby the mechanism is simplified in construction, its cost materially lessened, and the machine rendered more ac-V curate in its operation.

Referring to the accompanying drawings, 1 1 denote the two sides of the framework, suitably joined together by connecting rods or girths and supporting the journal-boxes of the shafts and other operative parts of the Vrock-shaft 22.

its ends driving-belt pulleys et e, having belt connections 5 5 with pulleys G G upon the ends of a saw-arbor 7, which carries a gang of saws 8, Fig. 2, offset or staggered, so as to produce a wider cut.

To the front of the framework -1 1 I attach the vertical guide -plates 9 9, forming ways for a sliding frame 10, upon which is mounted a table 11 for supporting the box-sides to be cut. vThe table 11 is provided with sides 12 12, between which the box-sides are held, and attached to the front of the machine is a faceplate 13, forming a gage or stop for the edge of the boxside which is presented to the saws. Inserted in the plate 13 and flush with the face is a grid 14T, having parallel bars with spaces between the bars to allow the teeth of the saws to project far enough to engage the box-sides held upon the table 11 and form teeth C ofthe desired length. Sides 12 12 are supported in ways formed in the table 11 and are laterally adjustable by means of the screws 15 and hand-wheels 16, said screws 15 beingV journaled in split bearings 17 and engaging screw-threaded holes in the sliding sides 12. Vhen the sides 12 are adjusted, the screws 15 are held from turning by tightening the bearings 17 by the clampingscrews 1S. Adjustably mounted upon the upper edges of the sides 12 is a guard-plate 19, extending across the grid 14 in front of the revolving saws as a protection for the operator. The vertically-'sliding frame 10 is pivotally connected by a pitman 2O with one end of a lever 21, which Iis attached at its opposite end to a The central portion of the lever carries a stud 23, upon which is mounted a cam-roll 23, running in the heart-shaped groove 24 of a cam 25, carried upon a shaft 26, suitably journaled in the framework -and provided with a belt-pulley 27 ,which is driven by a belt connection 2S with a pulley 29 on an intermediate shaft 30, which carries a beltpulley 31, driven by a belt connection 32 from the counter-shaft 2. The belt 28 is a loose belt, which is capable of being operatively tightened by means of a tightening-pulley 33, can ried upon a stud held in the end of a bell-crank 3l, which rocks upon a stud held in the framework and is connected by a link 35 with a lever 36, containing a treadle 37, thedepression of which throws the tightening -pulley 33 IOO against the belt, thereby rotating the cam 25 and raising the table 11 suiiiciently to carry the box-sides held thereon past the revolving gang of saws. The rock-shaft 22, to which the rock-lever 21 is attached, is counterbalanced by means of an arm 38 and a counterweight 39. The boxes 40 of the saw-arbor are movably supported in yokes 40, which yokes carry set-screws 40a, permitting the adjustment of the boxes therein, and these yokes are attached to the side frames, holding the saws in a fixed position relative to the table 1l. The face-plate 13 is attached to a pair of sliding plates 41, capable of sliding in horizontal ways 42 on the framework of the machine. The sliding plates 41 are connected by links 43 with radial arms 44, attached to a shaft 45, which is journaled in the framework and is provided at one end with a worm-gear 46, which is engaged by a worm 47 on a shaft 48, journaled in brackets on the side of the machine and carrying a handwheel 49, b'ywhich the shaft 45 is rocked in order to slide the plates 41 and vary the position of the stop-plate 13 and grid 14 relatively to the saws for the purpose of determining the depth of the cut in the box-sides. The table 11 is provided at each end with the beveled lips 51 5l to receive the beveled ends of a wooden false top 52, which is placed with its rear edge against the plate 13 and forms the direct support for the box-sides as they are presented to the saws which pass through the edges of the box-sides to form the teeth C, Fig. 5, and also through the wooden tabletop 52, the latter preventing the splintering of the lower box-side. The false table-top 52 is held in place by means'of the bars 53, which are let into recesses in the top of the table 11 beneath the top 52 and thumb-screws 55 55, held in the table and bearing against the under side of the bars 53, by which the top 52 is crowded upward against the beveled lips 51 51. The wooden top 52 is narrower than the box-sides to be cut thereon, one of which is shown by broken lines 52, Fig. 7. The foot-lever 36 when depressed is held down by notches 56 in a plate 57, attached to the frame of the machine, thereby causing a continuous rotary motion to be imparted to the cam 25. The groove 24 in the cam 25 is distorted from that of a symmetrical heartshaped cam, as shown in Fig. 6, in ord-er Ato give a slow upward movement and a quicker downward movement, thereby carrying the box-sides slowly past the saws, the table being carried up while the cam-roll 23 is passing through` the groove between the points 24 and 24h, or during more than a half-revolution of the cam 25, and allowed to fall while the cam-roll passes through the groove between the points 24b and 24?.

The operation ,of my improved box-cornercutting machine is as follows: Power is applied to the counter-shaft 2, from which the saw-arbor 7 is driven and from which the intermediate shaft 30 is rotated by means of the belt connection 32. The sides 12 on the table 11 are adjusted by the adjustable screws 15 and hand-wheels 16, and the box-sides to be cut are placed upon the wooden top 52, supported on the table 11 between the sides 12, with their rear edges against the gage or stop plate 13. The plate 13 is adjusted bythe handwheel-1:9 to determine the length of the tooth to be formed on the box-side, and the belt 28 is tightened, which causes the cam 25 to rotate with a slow movement, carrying the box-sides slowly past the revolving saws, the complete revolution of the cam 25 carrying the table 11 upward and returning it to its lowest position. The teeth of the saws in machines of this class are made slightly hooked, so their action will tend to draw the box-sides toward the corner formed by the gage or stop plate 13 and the table 11; but the saws or cutters form no part of my present invention. The side 12 on the right-hand side of the table is adjusted relatively to the saws to form the first tooth of the proper thickness or width, and the side 12, on the left-hand side of the table, is adjusted to fit the width of the boxsides, one or more of which can be cut at each reciprocating movement of the table 11.

' What I claim as my invention, and desire to secure by Letters Patent, is-

1. In amachine of the character described, the combination with a cutter-shaft having cutters located thereon, of boxes in which the shaft is journaled, yokes supporting the boxes, means for adjusting the boxes relative to the yokes, movable side plates, a faceplate carried thereby, links secured to the side plates, a rotary shaft, radial arms secured thereto and to the links and means for rotating the shaft to adjust the face-plate relative to the cutters.

2. In a machine forthe purpose stated, the combination with afeed-table provided with lips 51, 51, of a wooden or false top 52 held therein and means for tightening said top in said lips, substantially as described.

3. The combination with a feed-table provided with lips 51, of a wooden or false top held therein, bars 53 and screws 55 by which said top 52 is crowded against said lips, substantially as described.

4. The combination with a series of cutters, of a movable table, means for giving the table a reciprocating motion, a belt for driving the means, a tightening-wheel, a lever carrying the wheel, a foot-lever, a rod connecting the two levers, and a plate with which the foot-lever engages to retain the tighteningwheel in a plurality of positions.

Dated this 19th day of May, 1902.

` GEORGE E. PRIEST. Vitnesses:

M. M. SCHUERMANN,

RUFUS B. FowLER.

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